I have installed Redhat -5
STOP !!!! right there
First "RedHat Enterprise Linux" is NOT free !!!!
you HAVE to buy the required support contract / license ( no if's and's or but's)
RHEL5 is aging and is well "OVER THE HILL "
it is the LEGACY hardware /software operating system
you use it on 10+ ( 10 to 15) year old hardware
and the curent OLD legacy support version is RHEL 5.12
it also has NO support for any newish hardware
the Current operating system is RHEL 7.0
the Standard 1 year SERVER license is $799USD per YEAR
the std. HOME install with the Gnome Desktop
you HAVE TO BUY IT !!!!!
use the free rebuild CentOS 7.0
as to connecting to the net
that is a vmware issue
you did not set up a "bridge" for the Virtual OS to use
please read the instructions for installing a virtual OS on your VM